Yeah, I'm unsure how that could be implemented, unless you're (like SSH haha) encrypting the client<->relay comms (which might also be on top of HTTPS, as most relays run websockets over https) using the server's "known" pubkey
Discussion
Is there a protocol to make sure the key used for the wss is the expected one? Or is it like https where the client just takes any valid certificate that comes in?